90 VERMES. 



linear, flattened. Head obtuse, with ten or twelve black specks on its 

 surface. Plate X. fig. 13, specimen ; 14, head enlarged. A white pro- 

 boscis is darted from the anterior extremity. The predominant colour 

 is red, with short vivid red or yellow streaks. A stripe, generally yel- 

 lowish, runs down the back, and a broader stripe down the belly. 



I have had various specimens, mutilated, and some with obtuse ex- 

 tremities, believed to be entire. None would feed, nor did they manifest 

 any prominent features. 



One, which died in June, was full of spawn, apparently nearly ma- 

 ture. 



These animals take shelter in shells and other cavities. I conjec- 

 tured that a specimen had formed a slight silken sheath. 



PLATE X. 



Fie. 13. Vermiculus rubens. 



14. Head, enlarged. 



15. Another specimen ; back. 



16. Belly. 



1 7. Anterior portion of the same. 



18. Minute specimen, supposed the same. 



c. VERMICULUS LINEATUS The Line Worm. Plate X. figs. 19, 20. 



Of Vermiculi with two distinct eyes, the Vermiculus lineatus extends 

 to thirteen lines, and is very slender. Anterior extremity obtuse, with 

 two black eyes on the surface, near the front. Posterior extremity taper- 

 ing. Colour universally dark grey, with a white line down the back ; 

 anterior extremity, wherein the eyes are seated, white. Motion smooth 

 and gliding. 



A smaller specimen, with similar eyes, but the anterior portion ruddy, 

 I conjectured might be a young animal of the same species. 



From the motion of these creatures, the eyes are not readily ob- 

 served. 



PLATE X. 



FIG. 19. Vermiculus lineatus. 

 20. Head, enlarged. 



